The Formation and Control of Laves Phase in K418 and 42CrMo Dissimilar Metal Laser Weld

Ming Pang; Chang Zhen Liu; Guang Hui Xu; Jun Hua Ma

doi:10.4028/www.scientific.net/AMM.166-169.1839

Paper Titles

Seismic Performance of Masonry Buildings Retrofitted by Pre-Cast RC Panels
p.1811

Characteristics and Influencing Factors of Deflection in Concrete Beams Reinforced with FRP Bars
p.1818

Investigation of Effects of Baffle Configuration on the Performance of a Fixed-Cone Valve by Gas-Liquid Two-Phase Model
p.1824

Load-Deflection Analysis of RC Beams Strengthened with External CFRP Sheets
p.1830

The Formation and Control of Laves Phase in K418 and 42CrMo Dissimilar Metal Laser Weld
p.1839

Probability-Based Durability Analysis of Structural Concrete under Chloride Salt Environment
p.1843

Analytical Investigation of Progressive Collapse Resistance Mechanism in Steel Moment Frame with Fiber Model
p.1848

The Interval Estimation about Confidence of the Reliability Index
p.1854

A Survey of Sulfate Resistance Test Methods
p.1859

HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 166-169The Formation and Control of Laves Phase in K418...

The Formation and Control of Laves Phase in K418 and 42CrMo Dissimilar Metal Laser Weld

Abstract:

The effect of K418 and 42CrMo dissimilar metal laser welding velocity, temperature of post-weld heat treatment on controlling formation of laves phase were investigated. Microstructure and laves phase were characterized by optical microscopy (OM), scanning electron microscopy (SEM) and transmission electron microscopy (TEM).Results showed that Laves phase formed in the interdendritic regions of the weld metals as a result of segregation. The morphology and composition of Laves phase depended strongly on heat input/cooling rate and influenced its response to subsequent homogenization post-weld heat treatment.